Question about 1987 Honda XR 250 R

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Trying to remove magneto on 1987 honda xr80 bike will not fire

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First you need to get a fly wheel puller. then remove the nut in the middle of fly wheel,insert fly wheel puller,reverce thread,tighten pin and it will pop off fly wheel.when you put it back on remember to line up "woodruff key",its a little notch on fly wheel whitch lines up with a ridge on cam shaft. if you cant fix your problem and you have spark its probobly your coil and condencer.

Posted on Sep 21, 2009

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Posted on Jan 02, 2017

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My 1987 yamaha warrior 350 runs back and backfires, have tried everything (carvs, fuel, sparkplug, etc.) Im now looking at the pulse pickup, could that be a problem?

my bike had that symptom and the problem was that the key between the magneto and the crankshaft cutted in two and the magneto a 45 degree to late and back fired. to verify, put your timing mark at tdc on the magneto (you see it from the hole on top of the cover. when it's tdc see if the piston is at top with a screw driver through the spark plug hole, if its not at top, theres your problem.( sorry for the english im french)

Sep 02, 2012 | Motorcycles

2 Answers

Need help timing 1987 honda xr80..any help with markings for tdc and where to set cam..have no book and bike was more or less in pieces when we got it. robbed top half from slightly older 80cc. bike has...

Backfiring through the carb isn't a timing issue unless you're firing at BDC (180 degrees out).
or have bad/missing/cracked piston rings / hole in the piston.
I mean, correct me if I am wrong, but that thing IS a 2 stroke, right?

Mar 15, 2011 | 1987 Honda XR 250 R

2 Answers

I need a manual for a 2004 honda 80 xr bike

The factory Honda one is the best, from a dealer...or Clymer or Hayes makes them also.

Oct 02, 2009 | 2004 Honda XR 400R

1 Answer

Rapid popping/crackling noise in xr80

a four stroke will pop and backfire under decelleration when it is lean, or not enough fuel. (Jetting too small in the carburator) But, look at the spark plug for color, white is too lean, black is too rich, and chocolate is just right. Make sure the air filter is good and clean. And lastly... have the valves been adjusted?

Jul 30, 2009 | 2003 Honda XR 125 L

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No Spark for Spark Plug on 1984 Honda XR80 Dirt Bike

has it been under water, check the kill switch

Jul 01, 2009 | 2002 Honda XR 200

1 Answer

Not getting fire to the coil.

The magneto is inside the right side case cover.. I think the lutch is on the left side.. You can tell by where the cable goes in. good luck

Jun 16, 2009 | 1985 Honda CX 500 B

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